﻿<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>立方体、球体、圆柱、正多面体</title>
    <!-- <script src="https://cdn.staticfile.org/jquery/3.5.1/jquery.min.js"></script> -->
    <script src="../../js/three.js"></script>
    <script src="../../js/controls/OrbitControls.js"></script>
    <style type="text/css">
        body {
            margin: 0;
            overflow: hidden;
        }
    </style>
</head>

<body>
    <script>
        /**
         * 创建场景对象Scene
         */
        var scene = new THREE.Scene();
        /**
         * 创建网格模型
         */
        //长方体 参数：长，宽，高
        // var geometry = new THREE.BoxGeometry(100, 100, 100);
        // 球体 参数：半径60  经纬度细分数40,40
        // var geometry = new THREE.SphereGeometry(60, 40, 40);
        // 圆柱  参数：圆柱面顶部、底部直径50,50   高度100  圆周分段数
        // var geometry = new THREE.CylinderGeometry( 50, 50, 100, 25 );
        // 正八面体
        // var geometry = new THREE.OctahedronGeometry(50);
        // 正十二面体
        // var geometry = new THREE.DodecahedronGeometry(50);
        // 正二十面体
        var geometry = new THREE.IcosahedronGeometry(50);
        var material = new THREE.MeshLambertMaterial({
            color: 0x0000ff
        }); //材质对象Material
        var mesh = new THREE.Mesh(geometry, material); //网格模型对象Mesh
        scene.add(mesh); //网格模型添加到场景中
        /**
         * 光源设置
         */
        //点光源
        var point = new THREE.PointLight(0xffffff);
        point.position.set(400, 200, 300); //点光源位置
        scene.add(point); //点光源添加到场景中
        //环境光
        var ambient = new THREE.AmbientLight(0x444444);
        scene.add(ambient);
        /**
         * 相机设置
         */
        var width = window.innerWidth; //窗口宽度
        var height = window.innerHeight; //窗口高度
        var k = width / height; //窗口宽高比
        var s = 150; //三维场景显示范围控制系数，系数越大，显示的范围越大
        //创建相机对象
        var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
        camera.position.set(200, 300, 200); //设置相机位置
        camera.lookAt(scene.position); //设置相机方向(指向的场景对象)

        /**
         * 创建渲染器对象
         */
        var renderer = new THREE.WebGLRenderer();
        renderer.setSize(width, height); //设置渲染区域尺寸
        renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色
        document.body.appendChild(renderer.domElement); //body元素中插入canvas对象

        function render() {
            renderer.render(scene, camera) // 执行渲染
            requestAnimationFrame(render) //请求再次执行渲染函数render，渲染下一帧
        }
        render()
        //创建控件对象  相机对象camera作为参数   控件可以监听鼠标的变化，改变相机对象的属性
        var controls = new THREE.OrbitControls(camera, renderer.domElement)
    </script>
</body>

</html>